[PATCH 12/13] m68k/mm: enable use of generic memory_model.h for !DISCONTIGMEM

Mike Rapoport
2020-10-27T11:29:54Z

The pg_data_map and pg_data_table arrays as well as page_to_pfn() and
pfn_to_page() are required only for DISCONTIGMEM. Other memory models can
use the generic definitions in asm-generic/memory_model.h.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
arch/m68k/include/asm/page.h | 2 ++
arch/m68k/include/asm/page_mm.h | 5 +++++
arch/m68k/include/asm/virtconvert.h | 2 +-
arch/m68k/mm/init.c | 6 +++---
4 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/arch/m68k/include/asm/page.h b/arch/m68k/include/asm/page.h
index 2614a1206f2f..6116d7094292 100644
--- a/arch/m68k/include/asm/page.h
+++ b/arch/m68k/include/asm/page.h
@@ -62,8 +62,10 @@ extern unsigned long _ramend;
#include <asm/page_no.h>
#endif

+#ifdef CONFIG_DISCONTIGMEM
#define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT))
#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
+#endif

#include <asm-generic/getorder.h>

diff --git a/arch/m68k/include/asm/page_mm.h b/arch/m68k/include/asm/page_mm.h
index 0e794051d3bb..7f5912af2a52 100644
--- a/arch/m68k/include/asm/page_mm.h
+++ b/arch/m68k/include/asm/page_mm.h
@@ -153,6 +153,7 @@ static inline __attribute_const__ int __virt_to_node_shift(void)
pfn_to_virt(page_to_pfn(page)); \
})

+#ifdef CONFIG_DISCONTIGMEM
#define pfn_to_page(pfn) ({ \
unsigned long __pfn = (pfn); \
struct pglist_data *pgdat; \
@@ -165,6 +166,10 @@ static inline __attribute_const__ int __virt_to_node_shift(void)
pgdat = &pg_data_map[page_to_nid(__p)]; \
((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \
})
+#else
+#define ARCH_PFN_OFFSET (m68k_memory[0].addr)
+#include <asm-generic/memory_model.h>
+#endif

#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
diff --git a/arch/m68k/include/asm/virtconvert.h b/arch/m68k/include/asm/virtconvert.h
index dfe43083b579..751bb6f4aaf6 100644
--- a/arch/m68k/include/asm/virtconvert.h
+++ b/arch/m68k/include/asm/virtconvert.h
@@ -31,7 +31,7 @@ static inline void *phys_to_virt(unsigned long address)
/* Permanent address of a page. */
#if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK)
#define page_to_phys(page) \
- __pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
+ __pa(PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
#else
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#endif
diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
index 4b46ceace3d3..14c1e541451c 100644
--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -42,12 +42,12 @@ EXPORT_SYMBOL(empty_zero_page);

#ifdef CONFIG_MMU

-pg_data_t pg_data_map[MAX_NUMNODES];
-EXPORT_SYMBOL(pg_data_map);
-
int m68k_virt_to_node_shift;

#ifdef CONFIG_DISCONTIGMEM
+pg_data_t pg_data_map[MAX_NUMNODES];
+EXPORT_SYMBOL(pg_data_map);
+
pg_data_t *pg_data_table[65];
EXPORT_SYMBOL(pg_data_table);
#endif
--
2.28.0